Does the Pro 3EM support 3phase (3x 400V +N)

[Rafa]

Hello,

 

I'm looking to install a Shelly Pro 3EM (120A) to monitor my whole house energy consumption. 

My (Belgian) connection is a 3phase 3x 400V +1N, does the Pro 3EM support this type of connection?

[Heinz]

@Rafa that would be the Pro 3EM 400A version that would be an option here

[thgoebel]

Why should he use the 400A version, @Heinz? A Shelly pro 3EM would do the job…

[Heinz]

With 400V would that not be above the 120A range ?

[thgoebel]

Voltage is voltage, ampere (A) is current.

400V is both supported by Shelly pro 3EM and pro 3EM-400. The 400 is Ampere. Thus, the Shelly pro 3EM-400 has larger current clamps.

I suppose @Rafa is asking cause in wide parts of Belgium a Y network without neutral is used with 230/133V. Mains socket are connected between two live wires to achieve 230V. The voltage between live and ground (133V) is IMHO not used. For safety, a PE wire is led to each premise.

[G_MAN_be]

On 11/24/2024 at 7:44 PM, thgoebel said:

Voltage is voltage, ampere (A) is current.

400V is both supported by Shelly pro 3EM and pro 3EM-400. The 400 is Ampere. Thus, the Shelly pro 3EM-400 has larger current clamps.

I suppose @Rafa is asking cause in wide parts of Belgium a Y network without neutral is used with 230/133V. Mains socket are connected between two live wires to achieve 230V. The voltage between live and ground (133V) is IMHO not used. For safety, a PE wire is led to each premise.

Hey @thgoebel, indeed in Belgium we have 3 types of networks:

- Mono 230V

- 3 x 230

- 3 x 400 + N

In the latest, we get 230 volts between the L and N. And 400 volts between the L (See attached picture)

I am also very curious if the 3EM-120 does support 400 volts, as in the documentation of Shelly, they say it's up to 230v: https://www.shelly.com/blogs/documentation/shelly-pro-3em
Do you have experience with this?

Thanks!

 

[thgoebel]

Thanks for the clarification! Thus, the Belgian 3x400+N is the same as the commonly used system in Germany.

Hence, the Shelly pro 3EM-120 will run flawlessly in Belgium also!

Edited December 16, 2024 by thgoebel

[G_MAN_be]

Great, thanks a lot for the help!

To add more information for anyone wanting to do the same thing, I am planning on controlling the electrical stove using the add-on and this contactor: https://new.abb.com/products/1SAE232111R0640/en25-40n-06